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[Qemu-devel] [Bug 1096714] Re: qemu 1.3.0: usb devices shouldn't have sa
[Qemu-devel] [Bug 1096714] Re: qemu 1.3.0: usb devices shouldn't have same vendor/product ID and same serial
Thu, 27 Jul 2017 08:22:12 -0000
Try "-device usb-tablet,serial=1234"
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qemu 1.3.0: usb devices shouldn't have same vendor/product ID and same
Status in QEMU:
Boot Windows XP with
./qemu-system-i386 -device pci-ohci -device usb-tablet
and then with
./qemu-system-i386 -device pci-ohci -device usb-kbd
and you will notice, that the usb keyboard is not detected. In fact,
Windows XP detects the usb tablet and loads the driver for the tablet
instead of the driver for the keyboard.
The problem seems to be, that vendor and product ID and even the
seriel of both the usb tablet and the usb keyboard are the same as an
lsusb reveiles. Hence, Windows XP doesn't detect when you replace the
tablet by a keyboard and vice versa. I didn't check other USB devices,
but it seems a bad idea to me to have devices with the same
vendor/product Id. I'm not aware, whether it is sufficient to change
the seriel numbers of the devices.
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